Never forget the Premium Parking. It’s the most expensive, but it’s steps from the terminal door. I use this only when I’ve miscalculated my morning routine by an embarrassing amount. "I’ll be quick" becomes "Please hold the plane."
Is it worth it? Only if your time is worth more than your money. For most of us, it’s a guilty pleasure, like buying a $7 bottle of water. You hate yourself a little, but the convenience feels so good.